Perhaps you should try some spelling variations:
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
hieu ve » hieu va
xuc van » duc van, luc van, vuc van
hoi cua » hoi chuc
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach tru nang x hoi. ((hieu ve) or (hieu van)) cam xuc van hanh ((vi cua) or (hoi cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tru nang x hoi. ((hieu ve) OR (hieu van)) cam xuc van hanh ((vi cua) OR (hoi cua)) triet.
• Adding a wildcard symbol may retrieve word variants: su sach tru nang x hoi. ((hieu ve) or (hieu van)) cam xuc van hanh ((vi cua) or (hoi cua)) triet*.